<template>
	<view>
		<view class="search-box">
              <uni-search-bar @confirm="search" @input="input" :focus="true" :radius="100" cancelButton="none" placeholder="请输入搜索内容"></uni-search-bar>
		</view>
		<!-- 搜索列表 -->
		<view class="sugg-list" v-if="searchResult.length !== 0">
			<view class="sugg-item" v-for="(item ,i) in searchResult" :key="i" @click="gotoDetail(item)">
				<view class="goods-name">{{item.goods_name}}</view>
				<uni-icons type="arrowright" size="16"></uni-icons>
			</view>
		</view>
		
		<!-- 搜索历史区域 -->
		<view class="history-box" v-else>
			<view class="history-title">
				<text>搜索历史</text>
				<uni-icons type="trash" size="17" @click="cleanHistory"></uni-icons>
			</view>
			<!-- 列表区域 -->
			<view class="history-list" >
				<uni-tag :text="item" v-for="(item , i) in historyList" :key="i" @click="gotoGoodsList(item)"></uni-tag>
			</view>
		</view>
		
	</view>
</template>

<script>
	export default {
		data() {
			return {
				// 延时器
				timer:null,
				kw:'',
				searchResult:[],
				// 搜索历史
				historyList:[]
			};
		},
		onLoad() {
			// 持久化存储 将以存储的数据加载
			this.historyList = JSON.parse(uni.getStorageSync('kw')  ||  '[]')
		},
		methods:{
		// 用户输入事件
		  input(e){
			clearTimeout(this.timer)
			this.timer =  setTimeout(()=>{
				this.kw = e
				this.getSearchList()
				},800)
			},
			async getSearchList(){
				if(this.kw.length === 0) {
					this.searchResult = []
					return;
				}	
			   const {data : res} = await uni.$http.get('/api/public/v1/goods/qsearch',{query : this.kw})
			   if(res.meta.status !== 200) return uni.$showMsg()
			   this.searchResult = res.message
			   
			   // 添加历史搜索记录
			   this.saveSearchHistory()
			},
			gotoDetail(item){
				uni.navigateTo({
					url:'/subpkg/goods_detail/goods_detail?goods_id='+ item.goods_id
				})
			},
			// 保存搜索记录
			saveSearchHistory(){
				// if(this.historyList.includes(this.kw)){
				// 	this.historyList.slice(this.kw)
				// }
				// this.historyList.unshift(this.kw)
				
				// 将Array 数组转化为Set对象
				const set = new Set(this.historyList)
				// 移出相同元素
				set.delete(this.kw)
				// 将Set对象转化为Array数组
				this.historyList = Array.from(set)
				// 再次将相同的关键词加入数组
				this.historyList.unshift(this.kw)
				// 对搜索记录进行持久化处理
				uni.setStorageSync('kw',JSON.stringify(this.historyList))
			},
			// 删除搜索历史
			cleanHistory(){
				this.historyList = []
				uni.setStorageSync('kw' , '[]')
			},
			gotoGoodsList(kw){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?query=' + kw
				})
			}
			
		}
	}
</script>

<style lang="scss">
.search-box{
	background-color: #C00000;
	position: sticky;
	top: 0;
	z-index: 999;
}
.sugg-list{
	padding: 0 5px;
	.sugg-item{
		font-size: 15px;
		padding: 13px 0;
		border-bottom: 1px solid #efefef;
		// 纵向居中两端贴边
		display: flex;
		align-items: center;
		justify-content: space-between;
		.goods-name{
			white-space: nowrap;
			overflow: hidden;
			text-overflow: ellipsis;
			margin-right: 3px;
		}
	}
}
.history-box{
		padding: 0 10px;
		.history-title{
			height: 40px;
			font-size: 13px;
			display: flex;
			justify-content: space-between;
			// 纵向居中
			align-items: center;
		}
		.history-list{
			display: flex;
			flex-wrap: wrap;
			.uni-tag{
				margin-top: 5px;
				margin-right: 5px;
			}
		}
	}
</style>
